27983873 has 4 divisors (see below), whose sum is σ = 27994800. Its totient is φ = 27972948.

The previous prime is 27983863. The next prime is 27983881. The reversal of 27983873 is 37838972.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 27983873 - 2¹⁰ = 27982849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27983833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 686 + ... + 7512.

It is an arithmetic number, because the mean of its divisors is an integer number (6998700).

It is a Proth number, since it is equal to 427 ⋅ 2¹⁶ + 1 and 427 < 2¹⁶.

Almost surely, 2^27983873 is an apocalyptic number.

It is an amenable number.

27983873 is a deficient number, since it is larger than the sum of its proper divisors (10927).

27983873 is an equidigital number, since it uses as much as digits as its factorization.

27983873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10926.

The product of its digits is 508032, while the sum is 47.

The square root of 27983873 is about 5289.9785443799. The cubic root of 27983873 is about 303.6005870980.

The spelling of 27983873 in words is "twenty-seven million, nine hundred eighty-three thousand, eight hundred seventy-three".